Didn't know where else to put this so I'll try here.
Been having fun taking them apart to see what is different about each version.
Things like can I add a part to install a function switch to the basic F1?
Can I make a basic F1 an F1 Master etc.
I got an F1 that was giving errors real bad.
I cleaned the sensors and added a new battery and got 5 good readings in the shade out back.
So Now I'm going to use this one to try things out.
Planned is a function button to the main housing after I remove it to make it into a Master.
I also have a PC thing that will be mounted into the main housing instead of making a stand alone cable type.

Oh. I did manage to shoot the rear sensor will testing but it's just a flesh wound.